On Sat, 29 Nov 2003 09:10:31 -0800, Jon Drukman wrote:
> are the batteries that archos supplies with the JBR20 susceptible to
> the "memory effect"? i think mine are not working properly any more.

NiMh batteries have a limited number of charge cycles, but do not suffer
any substantial "memory effect" like NiCads do. How old is your JBR20,
and how many cycles would you estimate you have put on the batteries?

Regardless, they are quite inexpensive to replace with much higher
capacity cells. Energizer 2100mah AA cells are going for less than $10 a
4 pack in stores like WalMart, KMart etc.

> i've got rockbox CVS-031118 installed, and i left the unit plugged in
> all day yesterday and overnight. this morning i checked the info
> screen (charger still attached) and it said Charging: Trickle. i then
> turned it off and back on to see the new Charging Info screen which
> said Not Charging, 100% 10h and some minutes. with the charger still
> connected, i copied a few folders from my computer to the JBR. my
> batteries are now down to 87% and that was less than 3 minutes of
> actual disk activity! i've also noticed that using the JBR normally to
> listen to mp3's drains the batteries far faster than i would expect
> based on the battery life estimates shown on the unit. (ie: i can go
> from 100% to about 30% in just an hour or two of playing). what's
> going on here?
>
> if i want to open the JBR to replace the batteries, what size tool do i
> need? it looks like maybe a torx fastener.

It's on the end of your thumb. :) You see the notches in the faceplate
on either side of the F1, F2 and F3 buttons? Place your thumbnail (or a
small bladed screwdriver if you are a biter) into the notch and pry upward
and outward. The battery covers, once freed, will slide straight up out
of the unit, giving you access to the batteries.

You can find a lot of info on batteries in the Battery FAQ on the rockbox
site too.